BIO 201 Chapter 4 Study Questions and Correct Answers
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Course
BIO 201
Institution
BIO 201
Groups of cells that are similar in structure and perform a common or related function are called Tissues
These basic tissues are epithelial, connective, muscle and nervous
General role for each tissue type are covering-epithelial Support-Connective Movement-Muscle Control-Nervous
The studio of ...
BIO 201 Chapter 4 Study Questions and
Correct Answers
Groups of cells that are similar in structure and perform a common or related function
are called ✅Tissues
These basic tissues are ✅epithelial, connective, muscle and nervous
General role for each tissue type are ✅covering-epithelial
Support-Connective
Movement-Muscle
Control-Nervous
The studio of tissues ✅Histology
Histology compliments the study of gross anatomy because ✅together they provide
the structural basis for understanding organ physiology
Fixed ✅preserved
Sections ✅slices
Many dyes used in microscopy consist of ✅negatively or positively charged molecules
that bind within the tissue to macromolecules of the opposite charge
Tissue sections are "stained" with heavy metal salts for ✅Transmission Electron
Microscopy
(SEM) Scanning Electron Microscope provides ✅three dimensional pictures of an
unsectioned tissue surface
Preserved tissues exposed, resulting in minor distortions are called ✅Artifacts
Epithelial Tissues ✅is a sheet of cells that covers body surface or lines a body cavity
either as covering and lining epithelium or glandular epithelium.
Covering and Lining Epithelium forms... ✅the outer layer of the skin, dips into and lines
the open cavities of the cardiovascular, digestive and respiratory systems and covers
the walls and organs of the closed ventral body cavity.
Glandular Epithelium ✅fashions the glands of the body
, In its role as an interface tissue, epithelium accomplishes many functions, including...
✅Protection
Absorption
Filtration
Excretion
Secretion
And Sensory Reception.
The epithelium lining the digestive tract is specialized to ✅absorb substances
The epithelium lining the kidneys is specialized to ✅perform excretion, absorption,
secretion and filtration
Characteristics of epithelial tissues ✅Polarity-"apical surface"-exposed surface Basil
surface"-lower surface= apical basil polarity-cells regions near the upper surface differ
from lower in both structure and function
Most apical surfaces have ✅macrovilli
Macrovilli are ✅fingerlike extensions of the plasma membrane that work to increase
surface area and absorb or secrete substances
Some epithelia, such as the lining of the trachea, have ✅motile cilia that propel
substances along their free surface
The basal lamina is located ✅adjacent to the basil surface of an epithelium, working as
a thin, supporting sheet.
Basil lamina consists ✅of glycoprotiens secreted by the epithelial cells and acts as a
selective filter, determining which molecules to diffuse into the epithelium swell as acts
as a scaffolding along which epithelial cells can migrate to repair a wound
All epithelial cells except GLANDULAR EPITHELIUA, ✅fit close together to form a
continuous sheet
Reticular lamina ✅a layer of extracellular material containing a fine network of collagen
protein diners that belongs to the underlying connective tissue. Together, the 2 laminae
make up the basement membrane
Basement membrane ✅reinforces the epithelial sheet, helping it to resist stretching
and tearing forces and defines the epithelial boundary.
Innervated ✅supplied by nerve fibers
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